Adsorption type extraction tower
An extraction tower, adsorption technology, applied in solvent extraction, liquid solution solvent extraction, separation methods, etc., to achieve the effect of reducing back mixing rate, improving extraction efficiency, and high mass transfer.
Active Publication Date: 2022-06-10
湖南化工设计院有限公司
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Problems solved by technology
However, traditional extraction towers have the disadvantage of lower extraction efficiency due to back-mixing
Back mixing leads to a decrease in extraction efficiency. In order to obtain a certain product purity and extraction recovery, the industry has to increase the extraction solvent ratio or use multi-stage extraction.
However, the resulting problems are: increasing the extraction solvent ratio leads to an increase in the operating load of the extractant recovery section; the use of multi-stage extraction directly leads to increased equipment investment, increased floor space, and increased operational complexity
This technical solution improves the dispersion and mass transfer effect by setting the turntable, and the high-speed dispersion of the turntable leads to intensified back-mixing, but only by setting the ring partition to reduce the back-mixing rate, and the openings on the ring partition cannot prevent the upper and lower liquids from interacting. String, resulting in the back-mixing of the circulation channel still exists, so that the effect of reducing the back-mixing rate is limited
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[0022] Since the heavy extraction phase and the light extraction phase are immiscible and repel each other, the heavy extraction phase formed after stratification in the uplink 21 cannot pass through the area where the light extraction phase is located, and a barrier area where the light extraction phase is gathered is formed on the top of the uplink 21 , a small amount of extraction light phase formed after stratification in the uplink 21 will be adsorbed near the barrier area, and as more and more extraction light phases gather at the bottom of the barrier area, the buoyancy formed by the extraction light phase will become larger and larger , the extracted light phase can pass upwards smoothly from the barrier area where the extracted light phase gathers;
[0023] The upper and lower sides of the plurality of adsorption devices 1 are equipped with crushing devices for multi-stage crushing of the liquid. The crushing mass transfer area is formed near the crushing device, and ...
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An adsorption type extraction tower comprises a tower body, a crushing device for crushing liquid is arranged in the tower body, and the tower body is sequentially provided with a light phase outlet, a heavy phase inlet, a light phase inlet and a heavy phase outlet from top to bottom. A heavy phase inlet and a light phase inlet are formed in the tower body, a plurality of adsorption devices I for performing multi-stage extraction on liquid are vertically distributed in the tower body between the heavy phase inlet and the light phase inlet at intervals, each adsorption device I comprises a plurality of ascending parts and descending parts which are vertically arranged, a light phase adsorption layer is arranged in each ascending part, and a heavy phase adsorption layer is arranged in each descending part. According to the invention, through a plurality of adsorption devices I provided with ascending parts and descending parts, liquid can be subjected to multi-stage extraction, shunting and one-way flowing of an extraction light phase and an extraction heavy phase are realized, the back-mixing rate in the extraction process is reduced, the high mass transfer property of the rotation of the coupling stirring disc is realized, and the extraction efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of liquid-liquid extraction and separation, in particular to an adsorption extraction tower. Background technique [0002] As a kind of industrial liquid separation equipment, the extraction tower is widely used in chemical industry, petrochemical, pharmaceutical, metallurgy, nuclear industry, food, environmental protection and other industries because of its unique separation characteristics and separation effect. In order to optimize the extraction performance of the extraction tower, different types of extraction towers have been developed in the industry, among which sieve extraction towers, packed extraction towers, reciprocating sieve extraction towers, rotary disk extraction towers, and pulse extraction towers are widely used. However, traditional extraction towers have the disadvantage of lower extraction efficiency due to back-mixing. Back mixing leads to a decrease in extraction efficiency. In ord...
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IPC IPC(8): B01D11/04B01D17/022
CPCB01D11/0426B01D11/04B01D17/0202Y02P10/20
Inventor吴辉
Owner湖南化工设计院有限公司